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Finding the Fourth Proportional to 15,843.60, 21,864.60 and 9,130.86

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Solution

The fourth proportional to 15,843.60, 21,864.60 and 9,130.86 is: 12,600.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,843.60 : 21,864.60 = 9,130.86 : x
  2. Step 2: Convert to fraction form
    15,843.60/21,864.60 = 9,130.86/x
  3. Step 3: Cross multiply
    15,843.60x = 21,864.60 × 9,130.86
  4. Step 4: Simplify right side
    15,843.60x = 199,642,601.56
  5. Step 5: Solve for x
    x = 199,642,601.56/15,843.60
  6. Step 6: Final answer
    x = 12,600.84

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.